debian: rework packaging

- use the rebar3' debian/rules as template
- use override targets instead of the exact targets
- only install the escriptize osmo_dia2gsup file

Related: SYS#6006
Change-Id: I40add168875de87ef0cc62deeb5377d2ce080e45

contrib/systemd/osmo_dia2gsup.service

@@ -7,7 +7,7 @@ Type=simple
 Restart=always
 Environment="HOME=/var/lib/osmo_dia2gsup"
 ExecStartPre=/usr/bin/mkdir -p /var/lib/osmo_dia2gsup
-ExecStart=/usr/bin/erl -noshell -sname osmo_dia2gsup -eval "osmo_dia2gsup:start()."
+ExecStart=/usr/bin/osmo-dia2gsup
 RestartSec=2
 
 [Install]

debian/osmo-diameter2gsup.install

@@ -1,2 +1,2 @@
 /contrib/systemd/osmo_dia2gsup.service /lib/systemd/system/
-/_lib/* /usr/lib/erlang/lib/
+/_build/default/bin/osmo-dia2gsup /usr/bin/

debian/rules

@@ -1,18 +1,18 @@
 #!/usr/bin/make -f
-
-build:
-	rebar3 compile
-	rebar3 escriptize
-	rebar3 eunit
-	for i in _build/default/lib/*; do \
-		libdir=_lib/"$$(basename "$$i")"; \
-		mkdir -pv "$$libdir"; \
-		cp -rv "$$i/ebin" "$$libdir"; \
-	done
-	find _lib -name .empty -delete
-
-clean:
-	rm -rf _build _lib
+export DH_VERBOSE=1
+export DEB_BUILD_MAINT_OPTIONS = hardening=+all
+include /usr/share/dpkg/default.mk
+export ERL_COMPILER_OPTIONS=deterministic
 
 %:
 	dh $@
+
+override_dh_auto_build:
+	dh_auto_build
+	rebar3 compile
+	rebar3 escriptize
+	rebar3 eunit
+
+override_dh_clean:
+	dh_clean
+	rm -rf _build